<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
  <h1>登录页面</h1>
  <input type="text" v-model="user.username" placeholder="用户名">
  <input type="password" v-model="user.password" placeholder="密码">
  <input type="button" value="登录" @click="login()">
</div>
<!--引入axios和vue框架-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<script>
    let v = new Vue({
        el: "body>div",
        data: {
          user:{username:"",password:""}
        },
        methods: {
          login(){
            //发出异步
            axios.post("/login",v.user).then(function (response) {
              if (response.data==1){
                alert("登录成功!");
                location.href="/";
              }else if(response.data==2){
                alert("用户名不存在!");
              }else{
                alert("密码错误!");
              }
            })
          }
        }
    })
</script>
</body>
</html>